/*
 * Copyright 2011 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
#include "SampleApp.h"

#include "SkData.h"
#include "SkCanvas.h"
#include "SkDevice.h"
#include "SkGpuDevice.h"
#include "SkGraphics.h"
#include "SkImageEncoder.h"
#include "SkPaint.h"
#include "SkPicture.h"
#include "SkStream.h"
#include "SkTime.h"
#include "SkWindow.h"
#include "gl/SkNativeGLContext.h"

#include "SampleCode.h"
#include "GrContext.h"
#include "SkTypeface.h"

#include "gl/GrGLInterface.h"
#include "GrRenderTarget.h"

#include "SkPDFDevice.h"
#include "SkPDFDocument.h"
#include "SkStream.h"

#include <EGL/egl.h>
#include <GLES/gl.h>

#undef TEST_GPIPE

#ifdef  TEST_GPIPE
#define PIPE_FILEx
#ifdef  PIPE_FILE
#define FILE_PATH "/path/to/drawing.data"
#endif

#define PIPE_NETx
#ifdef  PIPE_NET
#include "SkSockets.h"
SkTCPServer gServer;
#endif

#define DEBUGGERx
#ifdef  DEBUGGER
extern SkView* create_debugger(const char* data, size_t size);
extern bool is_debugger(SkView* view);
SkTDArray<char> gTempDataStore;
#endif

#endif

#define USE_ARROWS_FOR_ZOOM true
//#define DEFAULT_TO_GPU

extern SkView* create_overview(int, const SkViewFactory*[]);
extern bool is_overview(SkView* view);
//extern SkView* create_transition(SkView*, SkView*, int);
//extern bool is_transition(SkView* view);


#define ANIMATING_EVENTTYPE "nextSample"
#define ANIMATING_DELAY     750

#ifdef SK_DEBUG
#define FPS_REPEAT_MULTIPLIER   1
#else
#define FPS_REPEAT_MULTIPLIER   10
#endif
#define FPS_REPEAT_COUNT    (10 * FPS_REPEAT_MULTIPLIER)

static SampleWindow* gSampleWindow;

static void postEventToSink(SkEvent* evt, SkEventSink* sink)
    {
    evt->setTargetID(sink->getSinkID())->post();
    }

///////////////////////////////////////////////////////////////////////////////

static const char* skip_until(const char* str, const char* skip)
    {
    if (!str)
        {
        return NULL;
        }
    return strstr(str, skip);
    }

static const char* skip_past(const char* str, const char* skip)
    {
    const char* found = skip_until(str, skip);
    if (!found)
        {
        return NULL;
        }
    return found + strlen(skip);
    }

static const char* gPrefFileName = "sampleapp_prefs.txt";

static bool readTitleFromPrefs(SkString* title)
    {
    SkFILEStream stream(gPrefFileName);
    if (!stream.isValid())
        {
        return false;
        }

    int len = stream.getLength();
    SkString data(len);
    stream.read(data.writable_str(), len);
    const char* s = data.c_str();

    s = skip_past(s, "curr-slide-title");
    s = skip_past(s, "=");
    s = skip_past(s, "\"");
    const char* stop = skip_until(s, "\"");
    if (stop > s)
        {
        title->set(s, stop - s);
        return true;
        }
    return false;
    }

static void writeTitleToPrefs(const char* title)
    {
    SkFILEWStream stream(gPrefFileName);
    SkString data;
    data.printf("curr-slide-title = \"%s\"\n", title);
    stream.write(data.c_str(), data.size());
    }

////////////////////////////////////////////////////////////////////////////////

class SampleWindow::DefaultDeviceManager : public SampleWindow::DeviceManager
    {
    public:

        DefaultDeviceManager()
            {
            fGrRenderTarget = NULL;
            fGrContext = NULL;
            fGL = NULL;
            fNullGrContext = NULL;
            fNullGrRenderTarget = NULL;
            }

        virtual ~DefaultDeviceManager()
            {
            SkSafeUnref(fGrRenderTarget);
            SkSafeUnref(fGrContext);
            SkSafeUnref(fGL);
            SkSafeUnref(fNullGrContext);
            SkSafeUnref(fNullGrRenderTarget);
            }

        virtual void init(SampleWindow* win)
            {

            if (!win->attachGL())
                {
                SkDebugf("Failed to initialize GL");
                }

            if (NULL == fGL)
                {
                fGL = GrGLCreateNativeInterface();
                GrAssert(NULL == fGrContext);
                fGrContext = GrContext::Create(kOpenGL_Shaders_GrEngine,
                                               (GrPlatform3DContext) fGL);
                }
            if (NULL == fGrContext || NULL == fGL)
                {
                SkSafeUnref(fGrContext);
                SkSafeUnref(fGL);
                SkDebugf("Failed to setup 3D");
                win->detachGL();
                }
            if (NULL == fNullGrContext)
                {
                const GrGLInterface* nullGL = GrGLCreateNullInterface();
                fNullGrContext = GrContext::Create(kOpenGL_Shaders_GrEngine,
                                                   (GrPlatform3DContext) nullGL);
                nullGL->unref();
                }
            }

        virtual bool supportsDeviceType(SampleWindow::DeviceType dType)
            {
            switch (dType)
                {
                case kRaster_DeviceType:
                case kPicture_DeviceType: // fallthru
                    return true;
                case kGPU_DeviceType:
                    return NULL != fGrContext && NULL != fGrRenderTarget;
                case kNullGPU_DeviceType:
                    return NULL != fNullGrContext && NULL != fNullGrRenderTarget;
                default:
                    return false;
                }
            }

        virtual bool prepareCanvas(SampleWindow::DeviceType dType,
                                   SkCanvas* canvas,
                                   SampleWindow* win)
            {
            switch (dType)
                {
                case kGPU_DeviceType:
                    if (fGrContext)
                        {
                        canvas->setDevice(new SkGpuDevice(fGrContext,
                                                          fGrRenderTarget))->unref();
                        }
                    else
                        {
                        return false;
                        }
                    break;
                case kNullGPU_DeviceType:
                    if (fNullGrContext)
                        {
                        canvas->setDevice(new SkGpuDevice(fNullGrContext,
                                                          fNullGrRenderTarget))->unref();
                        }
                    else
                        {
                        return false;
                        }
                    break;
                case kRaster_DeviceType:
                case kPicture_DeviceType:
                    break;
                }
            return true;
            }

        virtual void publishCanvas(SampleWindow::DeviceType dType,
                                   SkCanvas* canvas,
                                   SampleWindow* win)
            {
            if (fGrContext)
                {
                // in case we have queued drawing calls
                fGrContext->flush();
                if (NULL != fNullGrContext)
                    {
                    fNullGrContext->flush();
                    }
                if (dType != kGPU_DeviceType &&
                        dType != kNullGPU_DeviceType)
                    {
                    // need to send the raster bits to the (gpu) window
                    fGrContext->setRenderTarget(fGrRenderTarget);
                    const SkBitmap& bm = win->getBitmap();
                    fGrRenderTarget->writePixels(0, 0, bm.width(), bm.height(),
                                                 kSkia8888_PM_GrPixelConfig,
                                                 bm.getPixels(),
                                                 bm.rowBytes());
                    }
                }
            win->presentGL();
            }

        virtual void windowSizeChanged(SampleWindow* win)
            {
            if (fGrContext)
                {
                win->attachGL();

                GrPlatformRenderTargetDesc desc;
                desc.fWidth = SkScalarRound(win->width());
                desc.fHeight = SkScalarRound(win->height());
                desc.fConfig = kSkia8888_PM_GrPixelConfig;
                GR_GL_GetIntegerv(fGL, GR_GL_SAMPLES, &desc.fSampleCnt);
                GR_GL_GetIntegerv(fGL, GR_GL_STENCIL_BITS, &desc.fStencilBits);
                GrGLint buffer;
                GR_GL_GetIntegerv(fGL, GR_GL_FRAMEBUFFER_BINDING, &buffer);
                desc.fRenderTargetHandle = buffer;

                SkSafeUnref(fGrRenderTarget);
                fGrRenderTarget = fGrContext->createPlatformRenderTarget(desc);
                }
            if (NULL != fNullGrContext)
                {
                GrPlatformRenderTargetDesc desc;
                desc.fWidth = SkScalarRound(win->width());
                desc.fHeight = SkScalarRound(win->height());
                desc.fConfig = kSkia8888_PM_GrPixelConfig;
                desc.fStencilBits = 8;
                desc.fSampleCnt = 0;
                desc.fRenderTargetHandle = 0;
                fNullGrRenderTarget = fNullGrContext->createPlatformRenderTarget(desc);
                }
            }

        virtual GrContext* getGrContext(SampleWindow::DeviceType dType)
            {
            if (kNullGPU_DeviceType == dType)
                {
                return fNullGrContext;
                }
            else
                {
                return fGrContext;
                }
            }
    private:
        GrContext* fGrContext;
        const GrGLInterface* fGL;
        GrRenderTarget* fGrRenderTarget;
        GrContext* fNullGrContext;
        GrRenderTarget* fNullGrRenderTarget;
    };

///////////////
static const char view_inval_msg[] = "view-inval-msg";

void SampleWindow::postInvalDelay()
    {
    (new SkEvent(view_inval_msg, this->getSinkID()))->postDelay(1);
    }

static bool isInvalEvent(const SkEvent& evt)
    {
    return evt.isType(view_inval_msg);
    }
//////////////////

SkFuncViewFactory::SkFuncViewFactory(SkViewCreateFunc func)
    : fCreateFunc(func)
    {
    }

SkView* SkFuncViewFactory::operator() () const
    {
    return (*fCreateFunc)();
    }

#if 0
#include "GMSampleView.h"

SkGMSampleViewFactory::SkGMSampleViewFactory(GMFactoryFunc func)
    : fFunc(func)
    {
    }

SkView* SkGMSampleViewFactory::operator() () const
    {
    return new GMSampleView(fFunc(NULL));
    }

SkViewRegister* SkViewRegister::gHead;
SkViewRegister::SkViewRegister(SkViewFactory* fact) : fFact(fact)
    {
    fFact->ref();
    fChain = gHead;
    gHead = this;
    }

SkViewRegister::SkViewRegister(SkViewCreateFunc func)
    {
    fFact = new SkFuncViewFactory(func);
    fChain = gHead;
    gHead = this;
    }

SkViewRegister::SkViewRegister(GMFactoryFunc func)
    {
    fFact = new SkGMSampleViewFactory(func);
    fChain = gHead;
    gHead = this;
    }

class AutoUnrefArray
    {
    public:
        AutoUnrefArray() {}
        ~AutoUnrefArray()
            {
            int count = fObjs.count();
            for (int i = 0; i < count; ++i)
                {
                fObjs[i]->unref();
                }
            }
        SkRefCnt*& push_back()
            {
            return *fObjs.append();
            }

    private:
        SkTDArray<SkRefCnt*> fObjs;
    };

// registers GMs as Samples
// This can't be performed during static initialization because it could be
// run before GMRegistry has been fully built.
void SkGMRegistyToSampleRegistry()
    {
    static bool gOnce;
    static AutoUnrefArray fRegisters;

    if (!gOnce)
        {
        const skiagm::GMRegistry* gmreg = skiagm::GMRegistry::Head();
        while (gmreg)
            {
            fRegisters.push_back() = new SkViewRegister(gmreg->factory());
            gmreg = gmreg->next();
            }
        gOnce = true;
        }
    }
#endif
#if 0
#include <CoreFoundation/CoreFoundation.h>
#include <CoreFoundation/CFURLAccess.h>

static void testpdf()
    {
    CFStringRef path = CFStringCreateWithCString(NULL, "/test.pdf",
                       kCFStringEncodingUTF8);
    CFURLRef url = CFURLCreateWithFileSystemPath(NULL, path,
                   kCFURLPOSIXPathStyle,
                   false);
    CFRelease(path);
    CGRect box = CGRectMake(0, 0, 8*72, 10*72);
    CGContextRef cg = CGPDFContextCreateWithURL(url, &box, NULL);
    CFRelease(url);

    CGContextBeginPage(cg, &box);
    CGRect r = CGRectMake(10, 10, 40 + 0.5, 50 + 0.5);
    CGContextFillEllipseInRect(cg, r);
    CGContextEndPage(cg);
    CGContextRelease(cg);

    if (false)
        {
        SkBitmap bm;
        bm.setConfig(SkBitmap::kA8_Config, 64, 64);
        bm.allocPixels();
        bm.eraseColor(0);

        SkCanvas canvas(bm);

        }
    }
#endif

//////////////////////////////////////////////////////////////////////////////

enum FlipAxisEnum
    {
    kFlipAxis_X = (1 << 0),
    kFlipAxis_Y = (1 << 1)
    };

#include "SkDrawFilter.h"

class FlagsDrawFilter : public SkDrawFilter
    {
    public:
        FlagsDrawFilter(SkOSMenu::TriState lcd, SkOSMenu::TriState aa, SkOSMenu::TriState filter,
                        SkOSMenu::TriState hinting) :
            fLCDState(lcd), fAAState(aa), fFilterState(filter), fHintingState(hinting) {}

        virtual void filter(SkPaint* paint, Type t)
            {
            if (kText_Type == t && SkOSMenu::kMixedState != fLCDState)
                {
                paint->setLCDRenderText(SkOSMenu::kOnState == fLCDState);
                }
            if (SkOSMenu::kMixedState != fAAState)
                {
                paint->setAntiAlias(SkOSMenu::kOnState == fAAState);
                }
            if (SkOSMenu::kMixedState != fFilterState)
                {
                paint->setFilterBitmap(SkOSMenu::kOnState == fFilterState);
                }
            if (SkOSMenu::kMixedState != fHintingState)
                {
                paint->setHinting(SkOSMenu::kOnState == fHintingState ?
                                  SkPaint::kNormal_Hinting :
                                  SkPaint::kSlight_Hinting);
                }
            }

    private:
        SkOSMenu::TriState  fLCDState;
        SkOSMenu::TriState  fAAState;
        SkOSMenu::TriState  fFilterState;
        SkOSMenu::TriState  fHintingState;
    };

//////////////////////////////////////////////////////////////////////////////

#define MAX_ZOOM_LEVEL  8
#define MIN_ZOOM_LEVEL  -8

static const char gCharEvtName[] = "SampleCode_Char_Event";
static const char gKeyEvtName[] = "SampleCode_Key_Event";
static const char gTitleEvtName[] = "SampleCode_Title_Event";
static const char gPrefSizeEvtName[] = "SampleCode_PrefSize_Event";
static const char gFastTextEvtName[] = "SampleCode_FastText_Event";
static const char gUpdateWindowTitleEvtName[] = "SampleCode_UpdateWindowTitle";

bool SampleCode::CharQ(const SkEvent& evt, SkUnichar* outUni)
    {
    if (evt.isType(gCharEvtName, sizeof(gCharEvtName) - 1))
        {
        if (outUni)
            {
            *outUni = evt.getFast32();
            }
        return true;
        }
    return false;
    }

bool SampleCode::KeyQ(const SkEvent& evt, SkKey* outKey)
    {
    if (evt.isType(gKeyEvtName, sizeof(gKeyEvtName) - 1))
        {
        if (outKey)
            {
            *outKey = (SkKey)evt.getFast32();
            }
        return true;
        }
    return false;
    }

bool SampleCode::TitleQ(const SkEvent& evt)
    {
    return evt.isType(gTitleEvtName, sizeof(gTitleEvtName) - 1);
    }

void SampleCode::TitleR(SkEvent* evt, const char title[])
    {
    SkASSERT(evt && TitleQ(*evt));
    evt->setString(gTitleEvtName, title);
    }

bool SampleCode::RequestTitle(SkView* view, SkString* title)
    {
    SkEvent evt(gTitleEvtName);
    if (view->doQuery(&evt))
        {
        title->set(evt.findString(gTitleEvtName));
        return true;
        }
    return false;
    }

bool SampleCode::PrefSizeQ(const SkEvent& evt)
    {
    return evt.isType(gPrefSizeEvtName, sizeof(gPrefSizeEvtName) - 1);
    }

void SampleCode::PrefSizeR(SkEvent* evt, SkScalar width, SkScalar height)
    {
    SkASSERT(evt && PrefSizeQ(*evt));
    SkScalar size[2];
    size[0] = width;
    size[1] = height;
    evt->setScalars(gPrefSizeEvtName, 2, size);
    }

bool SampleCode::FastTextQ(const SkEvent& evt)
    {
    return evt.isType(gFastTextEvtName, sizeof(gFastTextEvtName) - 1);
    }

///////////////////////////////////////////////////////////////////////////////

static SkMSec gAnimTime;
static SkMSec gAnimTimePrev;

SkMSec SampleCode::GetAnimTime()
    {
    return gAnimTime;
    }
SkMSec SampleCode::GetAnimTimeDelta()
    {
    return gAnimTime - gAnimTimePrev;
    }
SkScalar SampleCode::GetAnimSecondsDelta()
    {
    return SkDoubleToScalar(GetAnimTimeDelta() / 1000.0);
    }

SkScalar SampleCode::GetAnimScalar(SkScalar speed, SkScalar period)
    {
    // since gAnimTime can be up to 32 bits, we can't convert it to a float
    // or we'll lose the low bits. Hence we use doubles for the intermediate
    // calculations
    double seconds = (double)gAnimTime / 1000.0;
    double value = SkScalarToDouble(speed) * seconds;
    if (period)
        {
        value = ::fmod(value, SkScalarToDouble(period));
        }
    return SkDoubleToScalar(value);
    }

GrContext* SampleCode::GetGr()
    {
    return gSampleWindow ? gSampleWindow->getGrContext() : NULL;
    }

// some GMs rely on having a skiagm::GetGr function defined
namespace skiagm
{
GrContext* GetGr()
    {
    return SampleCode::GetGr();
    }
}

//////////////////////////////////////////////////////////////////////////////

static SkView* curr_view(SkWindow* wind)
    {
    SkView::F2BIter iter(wind);
    return iter.next();
    }

static bool curr_title(SkWindow* wind, SkString* title)
    {
    SkView* view = curr_view(wind);
    if (view)
        {
        SkEvent evt(gTitleEvtName);
        if (view->doQuery(&evt))
            {
            title->set(evt.findString(gTitleEvtName));
            return true;
            }
        }
    return false;
    }

void SampleWindow::setZoomCenter(float x, float y)
    {
    fZoomCenterX = SkFloatToScalar(x);
    fZoomCenterY = SkFloatToScalar(y);
    }

bool SampleWindow::zoomIn()
    {
    // Arbitrarily decided
    if (fFatBitsScale == 25) return false;
    fFatBitsScale++;
    this->inval(NULL);
    return true;
    }

bool SampleWindow::zoomOut()
    {
    if (fFatBitsScale == 1) return false;
    fFatBitsScale--;
    this->inval(NULL);
    return true;
    }

void SampleWindow::updatePointer(int x, int y)
    {
    fMouseX = x;
    fMouseY = y;
    if (fShowZoomer)
        {
        this->inval(NULL);
        }
    }

static inline SampleWindow::DeviceType cycle_devicetype(SampleWindow::DeviceType ct)
    {
    static const SampleWindow::DeviceType gCT[] =
        {
        SampleWindow::kPicture_DeviceType,
        SampleWindow::kGPU_DeviceType,
        SampleWindow::kRaster_DeviceType, // skip the null gpu device in normal cycling
        SampleWindow::kRaster_DeviceType
        };
    return gCT[ct];
    }

SkViewRegister* SkViewRegister::gHead;
SkViewRegister::SkViewRegister(SkViewFactory* fact) : fFact(fact)
    {
    fFact->ref();
    fChain = gHead;
    gHead = this;
    }

SkViewRegister::SkViewRegister(SkViewCreateFunc func)
    {
    fFact = new SkFuncViewFactory(func);
    fChain = gHead;
    gHead = this;
    }

SampleWindow::SampleWindow(void* hwnd, int argc, char** argv, DeviceManager* devManager) : INHERITED(hwnd)
    {
    gSampleWindow = this;

#ifdef  PIPE_FILE
    //Clear existing file or create file if it doesn't exist
    FILE* f = fopen(FILE_PATH, "wb");
    fclose(f);
#endif

    fPicture = NULL;

#ifdef DEFAULT_TO_GPU
    fDeviceType = kGPU_DeviceType;
#else
    fDeviceType = kRaster_DeviceType;
#endif
    fUseClip = false;
    fNClip = false;
    fAnimating = false;
    fRotate = false;
    fPerspAnim = false;
    fPerspAnimTime = 0;
    fScale = false;
    fRequestGrabImage = false;
    fUsePipe = false;
    fMeasureFPS = false;
    fLCDState = SkOSMenu::kMixedState;
    fAAState = SkOSMenu::kMixedState;
    fFilterState = SkOSMenu::kMixedState;
    fHintingState = SkOSMenu::kMixedState;
    fFlipAxis = 0;
    fScrollTestX = fScrollTestY = 0;

    fMouseX = fMouseY = 0;
    fFatBitsScale = 8;
    fTypeface = SkTypeface::CreateFromTypeface(NULL, SkTypeface::kBold);
    fShowZoomer = false;

    fZoomLevel = 0;
    fZoomScale = SK_Scalar1;

    fMagnify = false;
    fDebugger = false;

    fSaveToPdf = false;
    fPdfCanvas = NULL;

    fTransitionNext = 6;
    fTransitionPrev = 2;

    int sinkID = this->getSinkID();
    fAppMenu.setTitle("Global Settings");
    int itemID;

    itemID =fAppMenu.appendList("Device Type", "Device Type", sinkID, 0,
                                "Raster", "Picture", "OpenGL", NULL);
    fAppMenu.assignKeyEquivalentToItem(itemID, 'd');
    itemID = fAppMenu.appendTriState("AA", "AA", sinkID, fAAState);
    fAppMenu.assignKeyEquivalentToItem(itemID, 'b');
    itemID = fAppMenu.appendTriState("LCD", "LCD", sinkID, fLCDState);
    fAppMenu.assignKeyEquivalentToItem(itemID, 'l');
    itemID = fAppMenu.appendTriState("Filter", "Filter", sinkID, fFilterState);
    fAppMenu.assignKeyEquivalentToItem(itemID, 'n');
    itemID = fAppMenu.appendTriState("Hinting", "Hinting", sinkID, fHintingState);
    fAppMenu.assignKeyEquivalentToItem(itemID, 'h');
    fUsePipeMenuItemID = fAppMenu.appendSwitch("Pipe", "Pipe" , sinkID, fUsePipe);
    fAppMenu.assignKeyEquivalentToItem(fUsePipeMenuItemID, 'p');
#ifdef DEBUGGER
    itemID = fAppMenu.appendSwitch("Debugger", "Debugger", sinkID, fDebugger);
    fAppMenu.assignKeyEquivalentToItem(itemID, 'q');
#endif
    itemID = fAppMenu.appendSwitch("Slide Show", "Slide Show" , sinkID, false);
    fAppMenu.assignKeyEquivalentToItem(itemID, 'a');
    itemID = fAppMenu.appendSwitch("Clip", "Clip" , sinkID, fUseClip);
    fAppMenu.assignKeyEquivalentToItem(itemID, 'c');
    itemID = fAppMenu.appendSwitch("Flip X", "Flip X" , sinkID, false);
    fAppMenu.assignKeyEquivalentToItem(itemID, 'x');
    itemID = fAppMenu.appendSwitch("Flip Y", "Flip Y" , sinkID, false);
    fAppMenu.assignKeyEquivalentToItem(itemID, 'y');
    itemID = fAppMenu.appendSwitch("Zoomer", "Zoomer" , sinkID, fShowZoomer);
    fAppMenu.assignKeyEquivalentToItem(itemID, 'z');
    itemID = fAppMenu.appendSwitch("Magnify", "Magnify" , sinkID, fMagnify);
    fAppMenu.assignKeyEquivalentToItem(itemID, 'm');
    itemID =fAppMenu.appendList("Transition-Next", "Transition-Next", sinkID,
                                fTransitionNext, "Up", "Up and Right", "Right",
                                "Down and Right", "Down", "Down and Left",
                                "Left", "Up and Left", NULL);
    fAppMenu.assignKeyEquivalentToItem(itemID, 'j');
    itemID =fAppMenu.appendList("Transition-Prev", "Transition-Prev", sinkID,
                                fTransitionPrev, "Up", "Up and Right", "Right",
                                "Down and Right", "Down", "Down and Left",
                                "Left", "Up and Left", NULL);
    fAppMenu.assignKeyEquivalentToItem(itemID, 'k');
    itemID = fAppMenu.appendAction("Save to PDF", sinkID);
    fAppMenu.assignKeyEquivalentToItem(itemID, 'e');

    this->addMenu(&fAppMenu);
    this->addMenu(&fSlideMenu);

//    this->setConfig(SkBitmap::kRGB_565_Config);
    this->setConfig(SkBitmap::kARGB_8888_Config);
    this->setVisibleP(true);
    this->setClipToBounds(false);
#if 0
    SkGMRegistyToSampleRegistry();
#endif
    int viewCount = 0;
        {

        const SkViewRegister* reg = SkViewRegister::Head();
        while (reg)
            {
            viewCount++;
            *fSamples.append() = reg->factory();
            reg = reg->next();
            }
        printf("views %d\n", viewCount);
        }

    fCurrIndex = 0;
    if (argc > 1)
        {
        fCurrIndex = findByTitle(argv[1]);
        if (fCurrIndex < 0)
            {
            fprintf(stderr, "Unknown sample \"%s\"\n", argv[1]);
            }
        }
    else
        {
        SkString title;
        if (readTitleFromPrefs(&title))
            {
            fCurrIndex = findByTitle(title.c_str());
            }
        }

    if (fCurrIndex < 0)
        {
        fCurrIndex = 0;
        }
    fCurrIndex = rand()%viewCount;
    printf("fCurrIndex %d\n", fCurrIndex);

    this->loadView((*fSamples[fCurrIndex])());

    fPDFData = NULL;

    if (NULL == devManager)
        {
        fDevManager = new DefaultDeviceManager();
        }
    else
        {
        devManager->ref();
        fDevManager = devManager;
        }
    fDevManager->init(this);


    // If another constructor set our dimensions, ensure that our
    // onSizeChange gets called.
    if (this->height() && this->width())
        {
        this->onSizeChange();
        }
    printf("%d %d\n",this->height() , this->width());
//while (1);
    // can't call this synchronously, since it may require a subclass to
    // to implement, or the caller may need us to have returned from the
    // constructor first. Hence we post an event to ourselves.
//    this->updateTitle();
    postEventToSink(new SkEvent(gUpdateWindowTitleEvtName), this);
    }

SampleWindow::~SampleWindow()
    {
    delete fPicture;
    delete fPdfCanvas;
    fTypeface->unref();

    SkSafeUnref(fDevManager);
    }


int SampleWindow::findByTitle(const char title[])
    {
    int i, count = fSamples.count();
    for (i = 0; i < count; i++)
        {
        if (getSampleTitle(i).equals(title))
            {
            return i;
            }
        }
    return -1;
    }

static SkBitmap capture_bitmap(SkCanvas* canvas)
    {
    SkBitmap bm;
    const SkBitmap& src = canvas->getDevice()->accessBitmap(false);
    src.copyTo(&bm, src.config());
    return bm;
    }

static bool bitmap_diff(SkCanvas* canvas, const SkBitmap& orig,
                        SkBitmap* diff)
    {
    const SkBitmap& src = canvas->getDevice()->accessBitmap(false);

    SkAutoLockPixels alp0(src);
    SkAutoLockPixels alp1(orig);
    for (int y = 0; y < src.height(); y++)
        {
        const void* srcP = src.getAddr(0, y);
        const void* origP = orig.getAddr(0, y);
        size_t bytes = src.width() * src.bytesPerPixel();
        if (memcmp(srcP, origP, bytes))
            {
            SkDebugf("---------- difference on line %d\n", y);
            return true;
            }
        }
    return false;
    }

static void drawText(SkCanvas* canvas, SkString string, SkScalar left, SkScalar top, SkPaint& paint)
    {
    SkColor desiredColor = paint.getColor();
    paint.setColor(SK_ColorWHITE);
    const char* c_str = string.c_str();
    size_t size = string.size();
    SkRect bounds;
    paint.measureText(c_str, size, &bounds);
    bounds.offset(left, top);
    SkScalar inset = SkIntToScalar(-2);
    bounds.inset(inset, inset);
    canvas->drawRect(bounds, paint);
    if (desiredColor != SK_ColorBLACK)
        {
        paint.setColor(SK_ColorBLACK);
        canvas->drawText(c_str, size, left + SK_Scalar1, top + SK_Scalar1, paint);
        }
    paint.setColor(desiredColor);
    canvas->drawText(c_str, size, left, top, paint);
    }

#define XCLIP_N  8
#define YCLIP_N  8

void SampleWindow::draw(SkCanvas* canvas)
    {
    if (!fDevManager->prepareCanvas(fDeviceType, canvas, this))
        {
        return;
        }
    // update the animation time
    if (!gAnimTimePrev && !gAnimTime)
        {
        // first time make delta be 0
        gAnimTime = SkTime::GetMSecs();
        gAnimTimePrev = gAnimTime;
        }
    else
        {
        gAnimTimePrev = gAnimTime;
        gAnimTime = SkTime::GetMSecs();
        }

    const SkMatrix& localM = fGesture.localM();
    if (localM.getType() & SkMatrix::kScale_Mask)
        {
        canvas->setExternalMatrix(&localM);
        }
    if (fGesture.isActive())
        {
        this->updateMatrix();
        }

    if (fNClip)
        {
        this->INHERITED::draw(canvas);
        SkBitmap orig = capture_bitmap(canvas);

        const SkScalar w = this->width();
        const SkScalar h = this->height();
        const SkScalar cw = w / XCLIP_N;
        const SkScalar ch = h / YCLIP_N;
        for (int y = 0; y < YCLIP_N; y++)
            {
            SkRect r;
            r.fTop = y * ch;
            r.fBottom = (y + 1) * ch;
            if (y == YCLIP_N - 1)
                {
                r.fBottom = h;
                }
            for (int x = 0; x < XCLIP_N; x++)
                {
                SkAutoCanvasRestore acr(canvas, true);
                r.fLeft = x * cw;
                r.fRight = (x + 1) * cw;
                if (x == XCLIP_N - 1)
                    {
                    r.fRight = w;
                    }
                canvas->clipRect(r);
                this->INHERITED::draw(canvas);
                }
            }

        SkBitmap diff;
        if (bitmap_diff(canvas, orig, &diff))
            {
            }
        }
    else
        {
        this->INHERITED::draw(canvas);
        }
    if (fShowZoomer && !fSaveToPdf)
        {
        showZoomer(canvas);
        }
    if (fMagnify && !fSaveToPdf)
        {
        magnify(canvas);
        }

    // do this last
    fDevManager->publishCanvas(fDeviceType, canvas, this);
    }

static float clipW = 200;
static float clipH = 200;
void SampleWindow::magnify(SkCanvas* canvas)
    {
    SkRect r;
    int count = canvas->save();

    SkMatrix m = canvas->getTotalMatrix();
    m.invert(&m);
    SkPoint offset, center;
    SkScalar mouseX = fMouseX * SK_Scalar1;
    SkScalar mouseY = fMouseY * SK_Scalar1;
    m.mapXY(mouseX - clipW/2, mouseY - clipH/2, &offset);
    m.mapXY(mouseX, mouseY, &center);

    r.set(0, 0, clipW * m.getScaleX(), clipH * m.getScaleX());
    r.offset(offset.fX, offset.fY);

    SkPaint paint;
    paint.setColor(0xFF66AAEE);
    paint.setStyle(SkPaint::kStroke_Style);
    paint.setStrokeWidth(10.f * m.getScaleX());
    //lense offset
    //canvas->translate(0, -250);
    canvas->drawRect(r, paint);
    canvas->clipRect(r);

    m = canvas->getTotalMatrix();
    m.setTranslate(-center.fX, -center.fY);
    m.postScale(0.5f * fFatBitsScale, 0.5f * fFatBitsScale);
    m.postTranslate(center.fX, center.fY);
    canvas->concat(m);

    this->INHERITED::draw(canvas);

    canvas->restoreToCount(count);
    }

void SampleWindow::showZoomer(SkCanvas* canvas)
    {
    int count = canvas->save();
    canvas->resetMatrix();
    // Ensure the mouse position is on screen.
    int width = SkScalarRound(this->width());
    int height = SkScalarRound(this->height());
    if (fMouseX >= width) fMouseX = width - 1;
    else if (fMouseX < 0) fMouseX = 0;
    if (fMouseY >= height) fMouseY = height - 1;
    else if (fMouseY < 0) fMouseY = 0;

    SkBitmap bitmap = capture_bitmap(canvas);
    bitmap.lockPixels();

    // Find the size of the zoomed in view, forced to be odd, so the examined pixel is in the middle.
    int zoomedWidth = (width >> 1) | 1;
    int zoomedHeight = (height >> 1) | 1;
    SkIRect src;
    src.set(0, 0, zoomedWidth / fFatBitsScale, zoomedHeight / fFatBitsScale);
    src.offset(fMouseX - (src.width()>>1), fMouseY - (src.height()>>1));
    SkRect dest;
    dest.set(0, 0, SkIntToScalar(zoomedWidth), SkIntToScalar(zoomedHeight));
    dest.offset(SkIntToScalar(width - zoomedWidth), SkIntToScalar(height - zoomedHeight));
    SkPaint paint;
    // Clear the background behind our zoomed in view
    paint.setColor(SK_ColorWHITE);
    canvas->drawRect(dest, paint);
    canvas->drawBitmapRect(bitmap, &src, dest);
    paint.setColor(SK_ColorBLACK);
    paint.setStyle(SkPaint::kStroke_Style);
    // Draw a border around the pixel in the middle
    SkRect originalPixel;
    originalPixel.set(SkIntToScalar(fMouseX), SkIntToScalar(fMouseY), SkIntToScalar(fMouseX + 1), SkIntToScalar(fMouseY + 1));
    SkMatrix matrix;
    SkRect scalarSrc;
    scalarSrc.set(src);
    SkColor color = bitmap.getColor(fMouseX, fMouseY);
    if (matrix.setRectToRect(scalarSrc, dest, SkMatrix::kFill_ScaleToFit))
        {
        SkRect pixel;
        matrix.mapRect(&pixel, originalPixel);
        // TODO Perhaps measure the values and make the outline white if it's "dark"
        if (color == SK_ColorBLACK)
            {
            paint.setColor(SK_ColorWHITE);
            }
        canvas->drawRect(pixel, paint);
        }
    paint.setColor(SK_ColorBLACK);
    // Draw a border around the destination rectangle
    canvas->drawRect(dest, paint);
    paint.setStyle(SkPaint::kStrokeAndFill_Style);
    // Identify the pixel and its color on screen
    paint.setTypeface(fTypeface);
    paint.setAntiAlias(true);
    SkScalar lineHeight = paint.getFontMetrics(NULL);
    SkString string;
    string.appendf("(%i, %i)", fMouseX, fMouseY);
    SkScalar left = dest.fLeft + SkIntToScalar(3);
    SkScalar i = SK_Scalar1;
    drawText(canvas, string, left, SkScalarMulAdd(lineHeight, i, dest.fTop), paint);
    // Alpha
    i += SK_Scalar1;
    string.reset();
    string.appendf("A: %X", SkColorGetA(color));
    drawText(canvas, string, left, SkScalarMulAdd(lineHeight, i, dest.fTop), paint);
    // Red
    i += SK_Scalar1;
    string.reset();
    string.appendf("R: %X", SkColorGetR(color));
    paint.setColor(SK_ColorRED);
    drawText(canvas, string, left, SkScalarMulAdd(lineHeight, i, dest.fTop), paint);
    // Green
    i += SK_Scalar1;
    string.reset();
    string.appendf("G: %X", SkColorGetG(color));
    paint.setColor(SK_ColorGREEN);
    drawText(canvas, string, left, SkScalarMulAdd(lineHeight, i, dest.fTop), paint);
    // Blue
    i += SK_Scalar1;
    string.reset();
    string.appendf("B: %X", SkColorGetB(color));
    paint.setColor(SK_ColorBLUE);
    drawText(canvas, string, left, SkScalarMulAdd(lineHeight, i, dest.fTop), paint);
    canvas->restoreToCount(count);
    }

void SampleWindow::onDraw(SkCanvas* canvas)
    {
    }

#include "SkColorPriv.h"

static void reverseRedAndBlue(const SkBitmap& bm)
    {
    SkASSERT(bm.config() == SkBitmap::kARGB_8888_Config);
    uint8_t* p = (uint8_t*)bm.getPixels();
    uint8_t* stop = p + bm.getSize();
    while (p < stop)
        {
        // swap red/blue (to go from ARGB(int) to RGBA(memory) and premultiply
        unsigned scale = SkAlpha255To256(p[3]);
        unsigned r = p[2];
        unsigned b = p[0];
        p[0] = SkAlphaMul(r, scale);
        p[1] = SkAlphaMul(p[1], scale);
        p[2] = SkAlphaMul(b, scale);
        p += 4;
        }
    }

void SampleWindow::saveToPdf()
    {
    fSaveToPdf = true;
    this->inval(NULL);
    }

SkCanvas* SampleWindow::beforeChildren(SkCanvas* canvas)
    {
    if (fSaveToPdf)
        {
        const SkBitmap& bmp = canvas->getDevice()->accessBitmap(false);
        SkISize size = SkISize::Make(bmp.width(), bmp.height());
        SkPDFDevice* pdfDevice = new SkPDFDevice(size, size,
                canvas->getTotalMatrix());
        fPdfCanvas = new SkCanvas(pdfDevice);
        pdfDevice->unref();
        canvas = fPdfCanvas;
        }
    else
        {
        switch (fDeviceType)
            {
            case kRaster_DeviceType:
            case kGPU_DeviceType:
                canvas = this->INHERITED::beforeChildren(canvas);
                break;
            case kPicture_DeviceType:
                fPicture = new SkPicture;
                canvas = fPicture->beginRecording(9999, 9999);
                break;
            case kNullGPU_DeviceType:
                break;
            }
        }

    if (fUseClip)
        {
        canvas->drawColor(0xFFFF88FF);
        canvas->clipPath(fClipPath, SkRegion::kIntersect_Op, true);
        }

    return canvas;
    }

static void paint_rgn(const SkBitmap& bm, const SkIRect& r,
                      const SkRegion& rgn)
    {
    SkCanvas    canvas(bm);
    SkRegion    inval(rgn);

    inval.translate(r.fLeft, r.fTop);
    canvas.clipRegion(inval);
    canvas.drawColor(0xFFFF8080);
    }
#include "SkData.h"
void SampleWindow::afterChildren(SkCanvas* orig)
    {
    if (fSaveToPdf)
        {
        fSaveToPdf = false;
        if (fShowZoomer)
            {
            showZoomer(fPdfCanvas);
            }
        SkString name;
        name.printf("%s.pdf", this->getTitle());
        SkPDFDocument doc;
        SkPDFDevice* device = static_cast<SkPDFDevice*>(fPdfCanvas->getDevice());
        doc.appendPage(device);
#ifdef SK_BUILD_FOR_ANDROID
        name.prepend("/sdcard/");
#endif

#ifdef SK_BUILD_FOR_IOS
        SkDynamicMemoryWStream mstream;
        doc.emitPDF(&mstream);
        fPDFData = mstream.copyToData();
#endif
        SkFILEWStream stream(name.c_str());
        if (stream.isValid())
            {
            doc.emitPDF(&stream);
            const char* desc = "File saved from Skia SampleApp";
            this->onPDFSaved(this->getTitle(), desc, name.c_str());
            }

        delete fPdfCanvas;
        fPdfCanvas = NULL;

        // We took over the draw calls in order to create the PDF, so we need
        // to redraw.
        this->inval(NULL);
        return;
        }

    if (fRequestGrabImage)
        {
        fRequestGrabImage = false;

        SkDevice* device = orig->getDevice();
        SkBitmap bmp;
        if (device->accessBitmap(false).copyTo(&bmp, SkBitmap::kARGB_8888_Config))
            {
            static int gSampleGrabCounter;
            SkString name;
            name.printf("sample_grab_%d", gSampleGrabCounter++);
            SkImageEncoder::EncodeFile(name.c_str(), bmp,
                                       SkImageEncoder::kPNG_Type, 100);
            }
        }

    if (kPicture_DeviceType == fDeviceType)
        {
        if (true)
            {
            SkPicture* pict = new SkPicture(*fPicture);
            fPicture->unref();
            this->installDrawFilter(orig);
            orig->drawPicture(*pict);
            pict->unref();
            }
        else if (true)
            {
            SkDynamicMemoryWStream ostream;
            fPicture->serialize(&ostream);
            fPicture->unref();

            SkAutoDataUnref data(ostream.copyToData());
            SkMemoryStream istream(data.data(), data.size());
            SkPicture pict(&istream);
            orig->drawPicture(pict);
            }
        else
            {
            fPicture->draw(orig);
            fPicture->unref();
            }
        fPicture = NULL;
        }

    // Do this after presentGL and other finishing, rather than in afterChild
    if (fMeasureFPS && fMeasureFPS_Time)
        {
        fMeasureFPS_Time = SkTime::GetMSecs() - fMeasureFPS_Time;
        this->updateTitle();
        this->postInvalDelay();
        }

    //    if ((fScrollTestX | fScrollTestY) != 0)
    if (false)
        {
        const SkBitmap& bm = orig->getDevice()->accessBitmap(true);
        int dx = fScrollTestX * 7;
        int dy = fScrollTestY * 7;
        SkIRect r;
        SkRegion inval;

        r.set(50, 50, 50+100, 50+100);
        bm.scrollRect(&r, dx, dy, &inval);
        paint_rgn(bm, r, inval);
        }
#ifdef DEBUGGER
    SkView* curr = curr_view(this);
    if (fDebugger && !is_debugger(curr) && !is_transition(curr) && !is_overview(curr))
        {
        //Stop Pipe when fDebugger is active
        fUsePipe = false;
        (void)SampleView::SetUsePipe(curr, false);
        fAppMenu.getItemByID(fUsePipeMenuItemID)->setBool(fUsePipe);
        this->onUpdateMenu(&fAppMenu);

        //Reset any transformations
        fGesture.stop();
        fGesture.reset();

        this->loadView(create_debugger(gTempDataStore.begin(),
                                       gTempDataStore.count()));
        }
#endif
    }

void SampleWindow::beforeChild(SkView* child, SkCanvas* canvas)
    {
    if (fScale)
        {
        SkScalar scale = SK_Scalar1 * 7 / 10;
        SkScalar cx = this->width() / 2;
        SkScalar cy = this->height() / 2;
        canvas->translate(cx, cy);
        canvas->scale(scale, scale);
        canvas->translate(-cx, -cy);
        }
    if (fRotate)
        {
        SkScalar cx = this->width() / 2;
        SkScalar cy = this->height() / 2;
        canvas->translate(cx, cy);
        canvas->rotate(SkIntToScalar(30));
        canvas->translate(-cx, -cy);
        }
    if (fPerspAnim)
        {
        fPerspAnimTime += SampleCode::GetAnimSecondsDelta();

        static const SkScalar gAnimPeriod = 10 * SK_Scalar1;
        static const SkScalar gAnimMag = SK_Scalar1 / 1000;
        SkScalar t = SkScalarMod(fPerspAnimTime, gAnimPeriod);
        if (SkScalarFloorToInt(SkScalarDiv(fPerspAnimTime, gAnimPeriod)) & 0x1)
            {
            t = gAnimPeriod - t;
            }
        t = 2 * t - gAnimPeriod;
        t = SkScalarMul(SkScalarDiv(t, gAnimPeriod), gAnimMag);
        SkMatrix m;
        m.reset();
        m.setPerspY(t);
        canvas->concat(m);
        }

    this->installDrawFilter(canvas);

    if (fMeasureFPS)
        {
        fMeasureFPS_Time = 0;   // 0 means the child is not aware of repeat-draw
        if (SampleView::SetRepeatDraw(child, FPS_REPEAT_COUNT))
            {
            fMeasureFPS_Time = SkTime::GetMSecs();
            }
        }
    else
        {
        (void)SampleView::SetRepeatDraw(child, 1);
        }
    if (fPerspAnim)
        {
        this->inval(NULL);
        }
    //(void)SampleView::SetUsePipe(child, fUsePipe);
    }

void SampleWindow::afterChild(SkView* child, SkCanvas* canvas)
    {
    canvas->setDrawFilter(NULL);
    }

static SkBitmap::Config gConfigCycle[] =
    {
    SkBitmap::kNo_Config,           // none -> none
    SkBitmap::kNo_Config,           // a1 -> none
    SkBitmap::kNo_Config,           // a8 -> none
    SkBitmap::kNo_Config,           // index8 -> none
    SkBitmap::kARGB_4444_Config,    // 565 -> 4444
    SkBitmap::kARGB_8888_Config,    // 4444 -> 8888
    SkBitmap::kRGB_565_Config       // 8888 -> 565
    };

static SkBitmap::Config cycle_configs(SkBitmap::Config c)
    {
    return gConfigCycle[c];
    }

void SampleWindow::changeZoomLevel(float delta)
    {
    fZoomLevel += SkFloatToScalar(delta);
    if (fZoomLevel > 0)
        {
        fZoomLevel = SkMinScalar(fZoomLevel, MAX_ZOOM_LEVEL);
        fZoomScale = fZoomLevel + SK_Scalar1;
        }
    else if (fZoomLevel < 0)
        {
        fZoomLevel = SkMaxScalar(fZoomLevel, MIN_ZOOM_LEVEL);
        fZoomScale = SK_Scalar1 / (SK_Scalar1 - fZoomLevel);
        }
    else
        {
        fZoomScale = SK_Scalar1;
        }
    this->updateMatrix();
    }

void SampleWindow::updateMatrix()
    {
    SkMatrix m;
    m.reset();
    if (fZoomLevel)
        {
        SkPoint center;
        //m = this->getLocalMatrix();//.invert(&m);
        m.mapXY(fZoomCenterX, fZoomCenterY, &center);
        SkScalar cx = center.fX;
        SkScalar cy = center.fY;

        m.setTranslate(-cx, -cy);
        m.postScale(fZoomScale, fZoomScale);
        m.postTranslate(cx, cy);
        }

    if (fFlipAxis)
        {
        m.preTranslate(fZoomCenterX, fZoomCenterY);
        if (fFlipAxis & kFlipAxis_X)
            {
            m.preScale(-SK_Scalar1, SK_Scalar1);
            }
        if (fFlipAxis & kFlipAxis_Y)
            {
            m.preScale(SK_Scalar1, -SK_Scalar1);
            }
        m.preTranslate(-fZoomCenterX, -fZoomCenterY);
        //canvas->concat(m);
        }
    // Apply any gesture matrix
    m.preConcat(fGesture.localM());
    m.preConcat(fGesture.globalM());

    this->setLocalMatrix(m);

    this->updateTitle();
    this->inval(NULL);
    }
bool SampleWindow::previousSample()
    {
    fCurrIndex = (fCurrIndex - 1 + fSamples.count()) % fSamples.count();
    SkView* view = (*fSamples[fCurrIndex])();
    this->loadView(view);
//    this->loadView(create_transition(curr_view(this), (*fSamples[fCurrIndex])(),
//                                     fTransitionPrev));
    return true;
    }

bool SampleWindow::nextSample()
    {
    fCurrIndex = (fCurrIndex + 1) % fSamples.count();
    SkView* view = (*fSamples[fCurrIndex])();
    this->loadView(view);
//    this->loadView(create_transition(curr_view(this), (*fSamples[fCurrIndex])(),
//                                     fTransitionNext));
    return true;
    }

bool SampleWindow::goToSample(int i)
    {
    fCurrIndex = (i) % fSamples.count();
    SkView* view = (*fSamples[fCurrIndex])();
    this->loadView(view);
//    this->loadView(create_transition(curr_view(this),(*fSamples[fCurrIndex])(), 6));
    return true;
    }

SkString SampleWindow::getSampleTitle(int i)
    {
    SkView* view = (*fSamples[i])();
    SkString title;
    SampleCode::RequestTitle(view, &title);
    view->unref();
    return title;
    }

int SampleWindow::sampleCount()
    {
    return fSamples.count();
    }

void SampleWindow::showOverview()
    {
    this->loadView(create_overview(fSamples.count(), fSamples.begin()));
//    this->loadView(create_transition(curr_view(this),
//                                     create_overview(fSamples.count(), fSamples.begin()),
//                                     4));
    }

void SampleWindow::installDrawFilter(SkCanvas* canvas)
    {
    canvas->setDrawFilter(new FlagsDrawFilter(fLCDState, fAAState,
                          fFilterState, fHintingState))->unref();
    }

void SampleWindow::postAnimatingEvent()
    {
    if (fAnimating)
        {
        (new SkEvent(ANIMATING_EVENTTYPE, this->getSinkID()))->postDelay(ANIMATING_DELAY);
        }
    }

bool SampleWindow::onEvent(const SkEvent& evt)
    {
    if (evt.isType(gUpdateWindowTitleEvtName))
        {
        this->updateTitle();
        return true;
        }
    if (evt.isType(ANIMATING_EVENTTYPE))
        {
        if (fAnimating)
            {
            this->nextSample();
            this->postAnimatingEvent();
            }
        return true;
        }
    if (evt.isType("replace-transition-view"))
        {
        this->loadView((SkView*)SkEventSink::FindSink(evt.getFast32()));
        return true;
        }
    if (evt.isType("set-curr-index"))
        {
        this->goToSample(evt.getFast32());
        return true;
        }
    if (isInvalEvent(evt))
        {
        this->inval(NULL);
        return true;
        }
    int selected = -1;
    if (SkOSMenu::FindListIndex(evt, "Device Type", &selected))
        {
        this->setDeviceType((DeviceType)selected);
        return true;
        }
    if (SkOSMenu::FindSwitchState(evt, "Pipe", &fUsePipe))
        {
#ifdef PIPE_NET
        if (!fUsePipe)
            gServer.disconnectAll();
#endif
        (void)SampleView::SetUsePipe(curr_view(this), fUsePipe);
        this->updateTitle();
        this->inval(NULL);
        return true;
        }
    if (SkOSMenu::FindSwitchState(evt, "Slide Show", NULL))
        {
        this->toggleSlideshow();
        return true;
        }
    if (SkOSMenu::FindTriState(evt, "AA", &fAAState) ||
            SkOSMenu::FindTriState(evt, "LCD", &fLCDState) ||
            SkOSMenu::FindTriState(evt, "Filter", &fFilterState) ||
            SkOSMenu::FindTriState(evt, "Hinting", &fHintingState) ||
            SkOSMenu::FindSwitchState(evt, "Clip", &fUseClip) ||
            SkOSMenu::FindSwitchState(evt, "Zoomer", &fShowZoomer) ||
            SkOSMenu::FindSwitchState(evt, "Magnify", &fMagnify) ||
            SkOSMenu::FindListIndex(evt, "Transition-Next", &fTransitionNext) ||
            SkOSMenu::FindListIndex(evt, "Transition-Prev", &fTransitionPrev))
        {
        this->inval(NULL);
        this->updateTitle();
        return true;
        }
    if (SkOSMenu::FindSwitchState(evt, "Flip X", NULL))
        {
        fFlipAxis ^= kFlipAxis_X;
        this->updateMatrix();
        return true;
        }
    if (SkOSMenu::FindSwitchState(evt, "Flip Y", NULL))
        {
        fFlipAxis ^= kFlipAxis_Y;
        this->updateMatrix();
        return true;
        }
    if (SkOSMenu::FindAction(evt,"Save to PDF"))
        {
        this->saveToPdf();
        return true;
        }
#ifdef DEBUGGER
    if (SkOSMenu::FindSwitchState(evt, "Debugger", &fDebugger))
        {
        if (fDebugger)
            {
            fUsePipe = true;
            (void)SampleView::SetUsePipe(curr_view(this), true);
            }
        else
            {
            this->loadView(fSamples[fCurrIndex]());
            }
        this->inval(NULL);
        return true;
        }
#endif
    return this->INHERITED::onEvent(evt);
    }

bool SampleWindow::onQuery(SkEvent* query)
    {
    if (query->isType("get-slide-count"))
        {
        query->setFast32(fSamples.count());
        return true;
        }
    if (query->isType("get-slide-title"))
        {
        SkView* view = (*fSamples[query->getFast32()])();
        SkEvent evt(gTitleEvtName);
        if (view->doQuery(&evt))
            {
            query->setString("title", evt.findString(gTitleEvtName));
            }
        SkSafeUnref(view);
        return true;
        }
    if (query->isType("use-fast-text"))
        {
        SkEvent evt(gFastTextEvtName);
        return curr_view(this)->doQuery(&evt);
        }
    if (query->isType("ignore-window-bitmap"))
        {
        query->setFast32(this->getGrContext() != NULL);
        return true;
        }
    return this->INHERITED::onQuery(query);
    }

static void cleanup_for_filename(SkString* name)
    {
    char* str = name->writable_str();
    for (size_t i = 0; i < name->size(); i++)
        {
        switch (str[i])
            {
            case ':':
                str[i] = '-';
                break;
            case '/':
                str[i] = '-';
                break;
            case ' ':
                str[i] = '_';
                break;
            default:
                break;
            }
        }
    }

bool SampleWindow::onHandleChar(SkUnichar uni)
    {
        {
        SkView* view = curr_view(this);
        if (view)
            {
            SkEvent evt(gCharEvtName);
            evt.setFast32(uni);
            if (view->doQuery(&evt))
                {
                return true;
                }
            }
        }

    int dx = 0xFF;
    int dy = 0xFF;

    switch (uni)
        {
        case '5':
            dx =  0;
            dy =  0;
            break;
        case '8':
            dx =  0;
            dy = -1;
            break;
        case '6':
            dx =  1;
            dy =  0;
            break;
        case '2':
            dx =  0;
            dy =  1;
            break;
        case '4':
            dx = -1;
            dy =  0;
            break;
        case '7':
            dx = -1;
            dy = -1;
            break;
        case '9':
            dx =  1;
            dy = -1;
            break;
        case '3':
            dx =  1;
            dy =  1;
            break;
        case '1':
            dx = -1;
            dy =  1;
            break;

        default:
            break;
        }

    if (0xFF != dx && 0xFF != dy)
        {
        if ((dx | dy) == 0)
            {
            fScrollTestX = fScrollTestY = 0;
            }
        else
            {
            fScrollTestX += dx;
            fScrollTestY += dy;
            }
        this->inval(NULL);
        return true;
        }

    switch (uni)
        {
        case 'f':
            // only
            toggleFPS();
            break;
        case 'g':
            fRequestGrabImage = true;
            this->inval(NULL);
            break;
        case 'i':
            this->zoomIn();
            break;
        case 'o':
            this->zoomOut();
            break;
        case 'r':
            fRotate = !fRotate;
            this->inval(NULL);
            this->updateTitle();
            return true;
        case 'k':
            fPerspAnim = !fPerspAnim;
            this->inval(NULL);
            this->updateTitle();
            return true;
        case '\\':
            if (fDevManager->supportsDeviceType(kNullGPU_DeviceType))
                {
                fDeviceType=  kNullGPU_DeviceType;
                this->inval(NULL);
                this->updateTitle();
                }
            return true;
        case 'p':
            {
            GrContext* grContext = this->getGrContext();
            if (grContext)
                {
                size_t cacheBytes = grContext->getGpuTextureCacheBytes();
                grContext->freeGpuResources();
                SkDebugf("Purged %d bytes from the GPU resource cache.\n",
                         cacheBytes);
                }
            }
        return true;
        case 's':
            fScale = !fScale;
            this->inval(NULL);
            this->updateTitle();
            return true;
        default:
            break;
        }

    if (fAppMenu.handleKeyEquivalent(uni)|| fSlideMenu.handleKeyEquivalent(uni))
        {
        this->onUpdateMenu(&fAppMenu);
        this->onUpdateMenu(&fSlideMenu);
        return true;
        }
    return this->INHERITED::onHandleChar(uni);
    }

void SampleWindow::setDeviceType(DeviceType type)
    {
    if (type != fDeviceType && fDevManager->supportsDeviceType(fDeviceType))
        fDeviceType = type;
    this->updateTitle();
    this->inval(NULL);
    }

void SampleWindow::toggleSlideshow()
    {
    fAnimating = !fAnimating;
    this->postAnimatingEvent();
    this->updateTitle();
    }

void SampleWindow::toggleRendering()
    {
    DeviceType origDevType = fDeviceType;
    do
        {
        fDeviceType = cycle_devicetype(fDeviceType);
        }
    while (origDevType != fDeviceType &&
            !fDevManager->supportsDeviceType(fDeviceType));
    this->updateTitle();
    this->inval(NULL);
    }

void SampleWindow::toggleFPS()
    {
    fMeasureFPS = !fMeasureFPS;
    this->updateTitle();
    this->inval(NULL);
    }

#include "SkDumpCanvas.h"

bool SampleWindow::onHandleKey(SkKey key)
    {
        {
        SkView* view = curr_view(this);
        if (view)
            {
            SkEvent evt(gKeyEvtName);
            evt.setFast32(key);
            if (view->doQuery(&evt))
                {
                return true;
                }
            }
        }
    switch (key)
        {
        case kRight_SkKey:
            if (this->nextSample())
                {
                return true;
                }
            break;
        case kLeft_SkKey:
            toggleRendering();
            return true;
        case kUp_SkKey:
            if (USE_ARROWS_FOR_ZOOM)
                {
                this->changeZoomLevel(1.f);
                }
            else
                {
                fNClip = !fNClip;
                this->inval(NULL);
                this->updateTitle();
                }
            return true;
        case kDown_SkKey:
            if (USE_ARROWS_FOR_ZOOM)
                {
                this->changeZoomLevel(-1.f);
                }
            else
                {
                this->setConfig(cycle_configs(this->getBitmap().config()));
                this->updateTitle();
                }
            return true;
        case kOK_SkKey:
            {
            SkString title;
            if (curr_title(this, &title))
                {
                writeTitleToPrefs(title.c_str());
                }
            return true;
            }
        case kBack_SkKey:
            this->showOverview();
            return true;
        default:
            break;
        }
    return this->INHERITED::onHandleKey(key);
    }

///////////////////////////////////////////////////////////////////////////////

static const char gGestureClickType[] = "GestureClickType";

bool SampleWindow::onDispatchClick(int x, int y, Click::State state,
                                   void* owner)
    {
    if (Click::kMoved_State == state)
        {
        updatePointer(x, y);
        }
    int w = SkScalarRound(this->width());
    int h = SkScalarRound(this->height());

    // check for the resize-box
    if (w - x < 16 && h - y < 16)
        {
        return false;   // let the OS handle the click
        }
    else if (fMagnify)
        {
        //it's only necessary to update the drawing if there's a click
        this->inval(NULL);
        return false; //prevent dragging while magnify is enabled
        }
    else
        {
        return this->INHERITED::onDispatchClick(x, y, state, owner);
        }
    }

class GestureClick : public SkView::Click
    {
    public:
        GestureClick(SkView* target) : SkView::Click(target)
            {
            this->setType(gGestureClickType);
            }

        static bool IsGesture(Click* click)
            {
            return click->isType(gGestureClickType);
            }
    };

SkView::Click* SampleWindow::onFindClickHandler(SkScalar x, SkScalar y)
    {
    return new GestureClick(this);
    }

bool SampleWindow::onClick(Click* click)
    {
    if (GestureClick::IsGesture(click))
        {
        float x = static_cast<float>(click->fICurr.fX);
        float y = static_cast<float>(click->fICurr.fY);

        switch (click->fState)
            {
            case SkView::Click::kDown_State:
                fGesture.touchBegin(click->fOwner, x, y);
                break;
            case SkView::Click::kMoved_State:
                fGesture.touchMoved(click->fOwner, x, y);
                this->updateMatrix();
                break;
            case SkView::Click::kUp_State:
                fGesture.touchEnd(click->fOwner);
                this->updateMatrix();
                break;
            }
        return true;
        }
    return false;
    }

///////////////////////////////////////////////////////////////////////////////

void SampleWindow::loadView(SkView* view)
    {
    SkView::F2BIter iter(this);
    SkView* prev = iter.next();
    if (prev)
        {
        prev->detachFromParent();
        }

    view->setVisibleP(true);
    view->setClipToBounds(false);
    this->attachChildToFront(view)->unref();
    view->setSize(this->width(), this->height());

    //repopulate the slide menu when a view is loaded
    fSlideMenu.reset();
#ifdef DEBUGGER
    if (!is_debugger(view) && !is_overview(view) && !is_transition(view) && fDebugger)
        {
        //Force Pipe to be on if using debugger
        fUsePipe = true;
        }
#endif
    (void)SampleView::SetUsePipe(view, fUsePipe);
    if (SampleView::IsSampleView(view))
        ((SampleView*)view)->requestMenu(&fSlideMenu);
    this->onUpdateMenu(&fSlideMenu);
    this->updateTitle();
    }

static const char* gConfigNames[] =
    {
    "unknown config",
    "A1",
    "A8",
    "Index8",
    "565",
    "4444",
    "8888"
    };

static const char* configToString(SkBitmap::Config c)
    {
    return gConfigNames[c];
    }

static const char* gDeviceTypePrefix[] =
    {
    "raster: ",
    "picture: ",
    "opengl: ",
    "null-gl: "
    };

static const char* trystate_str(SkOSMenu::TriState state,
                                const char trueStr[], const char falseStr[])
    {
    if (SkOSMenu::kOnState == state)
        {
        return trueStr;
        }
    else if (SkOSMenu::kOffState == state)
        {
        return falseStr;
        }
    return NULL;
    }

void SampleWindow::updateTitle()
    {
    SkView* view = curr_view(this);

    SkString title;
    if (!curr_title(this, &title))
        {
        title.set("<unknown>");
        }

    title.prepend(gDeviceTypePrefix[fDeviceType]);

    title.prepend(" ");
    title.prepend(configToString(this->getBitmap().config()));

    if (fAnimating)
        {
        title.prepend("<A> ");
        }
    if (fScale)
        {
        title.prepend("<S> ");
        }
    if (fRotate)
        {
        title.prepend("<R> ");
        }
    if (fNClip)
        {
        title.prepend("<C> ");
        }
    if (fPerspAnim)
        {
        title.prepend("<K> ");
        }

    title.prepend(trystate_str(fLCDState, "LCD ", "lcd "));
    title.prepend(trystate_str(fAAState, "AA ", "aa "));
    title.prepend(trystate_str(fFilterState, "H ", "h "));
    title.prepend(fFlipAxis & kFlipAxis_X ? "X " : NULL);
    title.prepend(fFlipAxis & kFlipAxis_Y ? "Y " : NULL);

    if (fZoomLevel)
        {
        title.prependf("{%.2f} ", SkScalarToFloat(fZoomLevel));
        }

    if (fMeasureFPS)
        {
        title.appendf(" %6.1f ms", fMeasureFPS_Time / (float)FPS_REPEAT_MULTIPLIER);
        }
    if (fUsePipe && SampleView::IsSampleView(view))
        {
        title.prepend("<P> ");
        }
    if (SampleView::IsSampleView(view))
        {
        title.prepend("! ");
        }

    this->setTitle(title.c_str());
    }

void SampleWindow::onSizeChange()
    {
    this->INHERITED::onSizeChange();

    SkView::F2BIter iter(this);
    SkView* view = iter.next();
    view->setSize(this->width(), this->height());

    // rebuild our clippath
        {
        const SkScalar W = this->width();
        const SkScalar H = this->height();

        fClipPath.reset();
#if 0
        for (SkScalar y = SK_Scalar1; y < H; y += SkIntToScalar(32))
            {
            SkRect r;
            r.set(SK_Scalar1, y, SkIntToScalar(30), y + SkIntToScalar(30));
            for (; r.fLeft < W; r.offset(SkIntToScalar(32), 0))
                fClipPath.addRect(r);
            }
#else
        SkRect r;
        r.set(0, 0, W, H);
        fClipPath.addRect(r, SkPath::kCCW_Direction);
        r.set(W/4, H/4, W*3/4, H*3/4);
        fClipPath.addRect(r, SkPath::kCW_Direction);
#endif
        }

    fZoomCenterX = SkScalarHalf(this->width());
    fZoomCenterY = SkScalarHalf(this->height());

#ifdef SK_BUILD_FOR_ANDROID
    // FIXME: The first draw after a size change does not work on Android, so
    // we post an invalidate.
    this->postInvalDelay();
#endif
    this->updateTitle();    // to refresh our config
    fDevManager->windowSizeChanged(this);
    }

///////////////////////////////////////////////////////////////////////////////

static const char is_sample_view_tag[] = "sample-is-sample-view";
static const char repeat_count_tag[] = "sample-set-repeat-count";
static const char set_use_pipe_tag[] = "sample-set-use-pipe";

bool SampleView::IsSampleView(SkView* view)
    {
    SkEvent evt(is_sample_view_tag);
    return view->doQuery(&evt);
    }

bool SampleView::SetRepeatDraw(SkView* view, int count)
    {
    SkEvent evt(repeat_count_tag);
    evt.setFast32(count);
    return view->doEvent(evt);
    }

bool SampleView::SetUsePipe(SkView* view, bool pred)
    {
    SkEvent evt(set_use_pipe_tag);
    evt.setFast32(pred);
    return view->doEvent(evt);
    }

bool SampleView::onEvent(const SkEvent& evt)
    {
    if (evt.isType(repeat_count_tag))
        {
        fRepeatCount = evt.getFast32();
        return true;
        }
    if (evt.isType(set_use_pipe_tag))
        {
        fUsePipe = !!evt.getFast32();
        return true;
        }
    return this->INHERITED::onEvent(evt);
    }

bool SampleView::onQuery(SkEvent* evt)
    {
    if (evt->isType(is_sample_view_tag))
        {
        return true;
        }
    return this->INHERITED::onQuery(evt);
    }

#ifdef TEST_GPIPE
#include "SkGPipe.h"

class SimplePC : public SkGPipeController
    {
    public:
        SimplePC(SkCanvas* target);
        ~SimplePC();

        /**
         * User this method to halt/restart pipe
         */
        void setWriteToPipe(bool writeToPipe)
            {
            fWriteToPipe = writeToPipe;
            }
        virtual void* requestBlock(size_t minRequest, size_t* actual);
        virtual void notifyWritten(size_t bytes);

    private:
        SkGPipeReader   fReader;
        void*           fBlock;
        size_t          fBlockSize;
        size_t          fBytesWritten;
        int             fAtomsWritten;
        SkGPipeReader::Status   fStatus;
        bool            fWriteToPipe;

        size_t        fTotalWritten;
    };

SimplePC::SimplePC(SkCanvas* target) : fReader(target)
    {
    fBlock = NULL;
    fBlockSize = fBytesWritten = 0;
    fStatus = SkGPipeReader::kDone_Status;
    fTotalWritten = 0;
    fAtomsWritten = 0;
    fWriteToPipe = true;
    }

SimplePC::~SimplePC()
    {
//    SkASSERT(SkGPipeReader::kDone_Status == fStatus);
    if (fTotalWritten)
        {
        if (fWriteToPipe)
            {
            SkDebugf("--- %d bytes %d atoms, status %d\n", fTotalWritten,
                     fAtomsWritten, fStatus);
#ifdef  PIPE_FILE
            //File is open in append mode
            FILE* f = fopen(FILE_PATH, "ab");
            SkASSERT(f != NULL);
            fwrite((const char*)fBlock + fBytesWritten, 1, bytes, f);
            fclose(f);
#endif
#ifdef PIPE_NET
            if (fAtomsWritten > 1 && fTotalWritten > 4)   //ignore done
                {
                gServer.acceptConnections();
                gServer.writePacket(fBlock, fTotalWritten);
                }
#endif
#ifdef  DEBUGGER
            gTempDataStore.reset();
            gTempDataStore.append(fTotalWritten, (const char*)fBlock);
#endif
            }
        }
    sk_free(fBlock);
    }

void* SimplePC::requestBlock(size_t minRequest, size_t* actual)
    {
    sk_free(fBlock);

    fBlockSize = minRequest * 4;
    fBlock = sk_malloc_throw(fBlockSize);
    fBytesWritten = 0;
    *actual = fBlockSize;
    return fBlock;
    }

void SimplePC::notifyWritten(size_t bytes)
    {
    SkASSERT(fBytesWritten + bytes <= fBlockSize);
    fStatus = fReader.playback((const char*)fBlock + fBytesWritten, bytes);
    SkASSERT(SkGPipeReader::kError_Status != fStatus);
    fBytesWritten += bytes;
    fTotalWritten += bytes;

    fAtomsWritten += 1;
    }

#endif

void SampleView::draw(SkCanvas* canvas)
    {
#ifdef TEST_GPIPE
    if (fUsePipe)
        {
        SkGPipeWriter writer;
        SimplePC controller(canvas);
        uint32_t flags = SkGPipeWriter::kCrossProcess_Flag;
        canvas = writer.startRecording(&controller, flags);
        //Must draw before controller goes out of scope and sends data
        this->INHERITED::draw(canvas);
        //explicitly end recording to ensure writer is flushed before the memory
        //is freed in the deconstructor of the controller
        writer.endRecording();
        controller.setWriteToPipe(fUsePipe);
        }
    else
        this->INHERITED::draw(canvas);
#else
    this->INHERITED::draw(canvas);
#endif
    }
void SampleView::onDraw(SkCanvas* canvas)
    {
    this->onDrawBackground(canvas);

    for (int i = 0; i < fRepeatCount; i++)
        {
        SkAutoCanvasRestore acr(canvas, true);
        this->onDrawContent(canvas);
        }
    }

void SampleView::onDrawBackground(SkCanvas* canvas)
    {
    canvas->drawColor(fBGColor);
    }

///////////////////////////////////////////////////////////////////////////////

template <typename T> void SkTBSort(T array[], int count)
    {
    for (int i = 1; i < count - 1; i++)
        {
        bool didSwap = false;
        for (int j = count - 1; j > i; --j)
            {
            if (array[j] < array[j-1])
                {
                T tmp(array[j-1]);
                array[j-1] = array[j];
                array[j] = tmp;
                didSwap = true;
                }
            }
        if (!didSwap)
            {
            break;
            }
        }

    for (int k = 0; k < count - 1; k++)
        {
        SkASSERT(!(array[k+1] < array[k]));
        }
    }

#include "SkRandom.h"

static void rand_rect(SkIRect* rect, SkRandom& rand)
    {
    int bits = 8;
    int shift = 32 - bits;
    rect->set(rand.nextU() >> shift, rand.nextU() >> shift,
              rand.nextU() >> shift, rand.nextU() >> shift);
    rect->sort();
    }

static void dumpRect(const SkIRect& r)
    {
    SkDebugf(" { %d, %d, %d, %d },\n",
             r.fLeft, r.fTop,
             r.fRight, r.fBottom);
    }

static void test_rects(const SkIRect rect[], int count)
    {
    SkRegion rgn0, rgn1;

    for (int i = 0; i < count; i++)
        {
        rgn0.op(rect[i], SkRegion::kUnion_Op);
        //   dumpRect(rect[i]);
        }
    rgn1.setRects(rect, count);

    if (rgn0 != rgn1)
        {
        SkDebugf("\n");
        for (int i = 0; i < count; i++)
            {
            dumpRect(rect[i]);
            }
        SkDebugf("\n");
        }
    }

static void test()
    {
    size_t i;

    const SkIRect r0[] =
        {
            { 0, 0, 1, 1 },
            { 2, 2, 3, 3 },
        };
    const SkIRect r1[] =
        {
            { 0, 0, 1, 3 },
            { 1, 1, 2, 2 },
            { 2, 0, 3, 3 },
        };
    const SkIRect r2[] =
        {
            { 0, 0, 1, 2 },
            { 2, 1, 3, 3 },
            { 4, 0, 5, 1 },
            { 6, 0, 7, 4 },
        };

    static const struct
        {
        const SkIRect* fRects;
        int            fCount;
        } gRecs[] =
        {
            { r0, SK_ARRAY_COUNT(r0) },
            { r1, SK_ARRAY_COUNT(r1) },
            { r2, SK_ARRAY_COUNT(r2) },
        };

    for (i = 0; i < SK_ARRAY_COUNT(gRecs); i++)
        {
        test_rects(gRecs[i].fRects, gRecs[i].fCount);
        }

    SkRandom rand;
    for (i = 0; i < 10000; i++)
        {
        SkRegion rgn0, rgn1;

        const int N = 8;
        SkIRect rect[N];
        for (int j = 0; j < N; j++)
            {
            rand_rect(&rect[j], rand);
            }
        test_rects(rect, N);
        }
    }

SkOSWindow* create_sk_window(void* hwnd, int argc, char** argv)
    {
    return new SampleWindow(hwnd, argc, argv, NULL);
    }

void get_preferred_size(int* x, int* y, int* width, int* height)
    {
    *x = 10;
    *y = 50;
    *width = 640;
    *height = 480;
    }

void application_init()
    {
//    setenv("ANDROID_ROOT", "../../../data", 0);
#ifdef SK_BUILD_FOR_MAC
    setenv("ANDROID_ROOT", "/android/device/data", 0);
#endif
    SkGraphics::Init();
    SkEvent::Init();
    }

void application_term()
    {
    SkEvent::Term();
    SkGraphics::Term();
    }

int getSampleCount(SkOSWindow* win)
    {
    SampleWindow * sample = reinterpret_cast<SampleWindow * >(win);
    return sample->sampleCount();
    }

void loadSample(SkOSWindow* win, int i)
    {
    SampleWindow * sample = reinterpret_cast<SampleWindow * >(win);
    sample->goToSample(i);
    }

bool loadSampleByTitle(SkOSWindow* win, const char *title)
    {
    SampleWindow * sample = reinterpret_cast<SampleWindow * >(win);
    int i = sample->findByTitle(title);
    
    if (i >= 0) 
        {
        sample->goToSample(i);
        return true;
        }
    else
        {
        return false;
        }
    }
